In reply to David Mann.

Great observation. Both IDC and Gartner use different methodologies, still that is indeed a big difference. One major factor is that the Meraki SD-WAN numbers are excluded from the Gartner report. Meraki has been a strong player within SD-WAN, but Gartner still atrributes those numbers to the UTM market reports; but this might change in the future. The IDC report however consolidates both Viptela and Meraki products.